Bob from SWISCO responded:
August 25, 2020
I believe you have the 39-172, but with a shorter link arm. You have a few options. First, you could try installing the new operator and see if it's not affected at all. Next, you could try repositioning the bracket on the sash to make up the difference. The 39-318 is also a similar operator, but I think this is too small all around. |